I'm starting to make reactive simulations using Steady Flamelet models. My objective is to simulate a hydrogen flame in air in a tipical bluff-body configuration. I'm using the Burke 2011 kinetic model (8 species + inerts and 19 reactions).

There is any golden rule to determine the following parameters to calculate the flamelet and generate the pdf table?

Number of Grid Points in Flamelet

Maximum Number of Flamelets

Number of Mean Mixture Fraction Points

Number of Mixture Fraction Variance Points

faudiS8

May 20, 2012 06:28

hi every body
is there anyone here to answer the question?
It's mine too!
Also I want to know if there's any optimum under-relaxations?
My model convergence has many fluctuations.

kingpots

November 19, 2012 17:23

Hi all ,
As far as i know there isn't any golden rule , however you can validate your results by looking to the Flamelet shape, species , scalar dissipation and mixture fractions .
I am always using the automated refinement with 8 to 40 points /20 flamelets and it gives good results . Check also the time vs . residuels while creating flamletes ,if it is smooth then you are good to go , if on the other hand it takes long time , try to redude the fourrier no. to 1 .